(19)
(11) EP 0 273 710 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.04.1990 Bulletin 1990/16

(43) Date of publication A2:
06.07.1988 Bulletin 1988/27

(21) Application number: 87311380.7

(22) Date of filing: 23.12.1987
(51) International Patent Classification (IPC)4: C08F 20/38, G02B 1/04
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI NL

(30) Priority: 26.12.1986 JP 308337/86
28.04.1987 JP 103017/87
30.10.1987 JP 273270/87

(71) Applicant: Nippon Shokubai Kagaku Kogyo Co., Ltd
Osaka-shi Osaka-fu 541 (JP)

(72) Inventors:
  • Matsuda, Tatsuhito
    Kobe-shi Hyogo-ken (JP)
  • Funae, Yasuaki
    Suita-shi Osaka-fu (JP)
  • Yoshida, Masahiro
    Suita-shi Osaka-fu (JP)
  • Takaya, Tsuguo
    Ohtsu-shi Shiga-ken (JP)

(74) Representative: Cresswell, Thomas Anthony et al
J.A. KEMP & CO. 14 South Square Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB)


(56) References cited: : 
   
       


    (54) Resin having high refractive index, process for producing said resin and optical materials composed of said resin


    (57) A process for producing a resin ahving a high refractive index which comprises radically polymerizing a material monomer, characterized in that said material monomer comprises [I] at least one polymerizable monomer selected from the group consisting of a polyfunctional thioacrylate and a polyfunctional thiomethacrylate (as an indispensable component), and optionally [II] at least one other polymerizable monomer which is radically polymeriz­able with said polymerizable monomer [I], a resin having a high refractive index produced by said process and optical materials, especially lenses and disk substrates prepared from said resin.





    Search report